Superfecial mycosis Pityriasis versicolor(Tinea versicolor) Brown or discolored, or white patches on skin affect stratum corneum The white lesion don’t tan in the sun Endogenous source of infection Etiology: Malassezia furfur It is a yeasts (Pityrosporum orbiculare) Blastomycetidae, bipolar budding, skin flora Lipophilic: oilic acid or mineral oil
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Superfecial mycosis Pityriasis versicolor(Tinea versicolor ) Brown or discolored, or white patches on skin affect stratum corneum The white lesion.
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Superfecial mycosis
Pityriasis versicolor(Tinea versicolor)Brown or discolored, or white patches on skin affect stratum corneum
The white lesion don’t tan in the sun
Endogenous source of infection
Etiology: Malassezia furfur
It is a yeasts (Pityrosporum orbiculare)
Blastomycetidae, bipolar budding, skin flora
Lipophilic: oilic acid or mineral oil
Laboratory diagnosis
Specimens: Skin scraping
10% or 20 % KOH will show short hyphal segments and round yeast cells (spaghetti and meat ball appearance)
Culture on SDA and mycobiotic medium (SDACC=actidione) with oily substances
Superfecial mycosis
Tinea nigra (T.n. palmaris)
•Macular brown lesions or black stripes on palm of the hand or sole of foot
•Acquired by piercing of skin with plant material in agricultural soil